H.323 Trunk Group Services

The 'h323TrunkGroup' object binds an H.323 trunk to an H.323 Trunk group and assigns a name and properties to this binding.

The administrative state of the H.323 service is by default disabled, inactive, and configurable. When enabled, the H.323 service is active. Temporarily remove and restore this service by toggling its operational state between “inService” and “outOfService”. Since removing service in this manner may disrupt existing calls, a confirmation prompt displays to verify your intent.

SIP-H.323 Interworking Function for Video

SIP-H.323 Interworking Function (IWF) is a logical entity allowing interworking between SIP and H.323 protocols. IWF can be implemented as part of a VoIP network server such as an H.323 Gatekeeper, a SIP Proxy, or an external SIP-H.323 signaling gateway. The

H.323 Overlap Dialing Support

The

Spacevars

0

series4

supports H.323 overlap dialing, when configured, to process an incoming H.323 call request with incomplete called party digits in the initial SETUP message and subsequent digits in INFO messages to complete the dial sequence resulting in a successful route. When configured on the egress side, a SETUP message is sent without sufficient called party digits and forwards extra digits as it receives them from the ingress side in INFO messages to complete the call.

H.323 Signaling Agent

acts as SIP/SIP-I Back-to-Back User Agent (B2B UA) for packet-to-packet calls, and as a H.323 Gateway based on the following:

H.323

H.225

H.245

H.450

H.323 Redundancy

The

Spacevars

0

product

supports H.323 redundancy on a best effort basis depending upon the TCP activity of the endpoint. Stable calls with endpoints that do not send any TCP activity (most audio-only calls) will survive a switchover independent of the call rate. Endpoints that do use short TCP keep-alive packets, or are chatty based on their application (such as video), most likely will not survive a switchover.

H.323-SIP and SIP-H323 Calls

When using H.323-SIP and SIP-H.323 call flows, an additional Re-invite/Update may get generated towards the SIP side. To suppress this, enable the IP Signaling Profile (IPSP) flag Minimize Relaying Of Media Changes From Other Call Leg at SIP side.